THE THYROID GLAND AND IODINE
The cells in the thyroid gland take up and hold onto iodine. Iodine is an essential ingredient used by the thyroid cells to make thyroid hormones. Since thyroid cells use iodine, radioactive iodine can be used to both diagnose and treat thyroid problems.
WHAT IS RADIOACTIVE IODINE (RAI)?
Iodine can be made into two radioactive forms that are commonly used in patients with thyroid problems:
- I-123 (does not damage thyroid cells)
- I-131 (can be used to destroy thyroid cells)
- Both forms of RAI are given as a pill or liquid that you swallow
- RAI is safe to use even if you have had an allergic reaction to seafood or CT contrast